Yes, the 1970s were cold. Why not compare against the 1930s?
This is junk science at its worst
In 1999, Hansen said the exact opposite of what he is claiming now.
Empirical evidence does not lend much support to the notion that climate is headed precipitately toward more extreme heat and drought. The drought of 1999 covered a smaller area than the 1988 drought, when the Mississippi almost dried up. And 1988 was a temporary inconvenience as compared with repeated droughts during the 1930s “Dust Bowl” that caused an exodus from the prairies, as chronicled in Steinbeck’s Grapes of Wrath.
He is either suffering from dementia, or is a crook.